The ornamental design for a pedicurespachairarm, as shown and described.
FIG. 1 is a first perspective view of a right pedicure spa chair arm, where the corresponding left arm is a mirror image of that shown;
FIG. 2 is a second perspective view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown;
FIG. 3 is a left side view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown;
FIG. 4 is a right side view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown;
FIG. 5 is a top view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown;
FIG. 6 is a bottom view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown;
FIG. 7 is a rear view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown;
FIG. 8 is a front view of the pedicure spa chair arm depicted in FIG. 1 where the corresponding left arm is a mirror image of that shown; and,
FIG. 9 is a front, left, top perspective view of the pedicure spa chair arm depicted in FIG. 1 in its environment along with a mirror image left arm, where those portions of the design depicted in ghost are not part of the inventive design.